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A member asked:
What do the heart valves do?
A doctor has provided 1 answer
Prevent leak-back: The valves keep the blood moving forward in the circulatory system. The blood moves in starts and stops, with each heart beat. So to keep it moving forward and to prevent it from leaking back when the heart relaxes, there are one-way valves in place, much like the locks and dams in the panama canal.
Answered 9/23/2012
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